L.A. police lieutenant Milo Sturgis investigates a double homicide at the site of an unfinished, obscenely large mansion in bestseller Kellerman's nerve-tingling 24th Alex Delaware novel (after Bones ). Construction halted on the house two years earlier, and ownership can be traced only to a defunct holding company in Washington, D.C. The male victim is easily identified—Desmond Backer, who worked for an odd little architectural firm—but the female victim's identity isn't immediately apparent. Alex serves as a sounding board while Milo pursues assorted rumors and false leads: the site owners are Arabs, Asians, Muslims; the killings were vengeance; the victims were eco-terrorists; the deaths are linked to the disappearance of a Swedish or Swiss woman years before. Without magic, just steady, inspired police work, including horse-trading with the FBI and skillful interrogations, Milo uncovers the unsavory truth. (Oct.)